1755 rear end seals

[Fred Miller]

Hi,

My brother-in-law has a recently acquired 1755 with low hours. He was out using it when the rear froze up. It had plenty of oil in the rear.

After taking it in for an expensive repair which required some new gears and internal seals he was told the problem was due to the internal seal failure. They are supposed to keep the oil higher in the rear and preclude this type of failure.

Does this explanation make sense? If so, how do you tell if this seal failure is imminent and preclude the costly repair?

Thanks in advance,

Fred

 

[e]

Do you know what froze up and what "internal seals" they are refering to?

These transmission are pretty dang simple and basically the only places there are internal seals are at the input shaft to get oil from the pump to the gears and seals to get pressurized oil into the pinion gear.

In either case, the amount of oil going to the seals is dictated by the pump, not the oil level in the transmission. Adding extra oil will only increase parasitic losses and increase the likelihood of creating excessive aeration.

 

[Anonymous-0]

I agree with e. Do you have the work order with part numbers? You might want to add a light or a guage to let you know if you do or do not have transmission lube pressure.

 

[Fred Miller]

Thanks Gents! I will ask my brother-in-law if he has that info and get back on this subject. I truly appreciate your input!

Fred

 

[RonL]

I have a 1955 that would employe the same rear end design with presurized transmission lube. Where would a guy best tap into the pressurized system to install a "murphy" switch? At what pressure should a guy have this switch set for a go, no go, pressure?